Revert to Ruby 3.1 that defaults to 3.1.6

Author: one-data-cookie

.github/workflows/jekyll.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@086ffb1a2090c870a3f881cc91ea83aa4243d408 # v1.195.0
         with:
-          ruby-version: '3.1.7' # Not needed with a .ruby-version file
+          ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
           cache-version: 0 # Increment this number if you need to re-download cached gems
       - name: Setup Pages